Federal direct subsidized loans are based on financial need. The federal government pays the interest during in-school, grace and deferment periods. Federal direct unsubsidized loans are not based on financial need, and the federal government does not pay the interest for these loans. Students may choose to defer interest payments until repayment begins; however, the student is responsible for all interest that accrues.
1 Outdoor air pollution can cause ongoing throat irritation. Indoor pollution â tobacco smoke or chemicals â also can cause a chronic sore throat. Chewing tobacco, drinking alcohol and eating spicy foods also can irritate your throat.  Muscle strain.
The Centers for Disease Control warns that smokeless tobacco use can cause cancer, oral health problems, and nicotine addiction. The effects of chewing tobacco on your teeth and overall health are very serious. Gum Recession: Having a small âpinchâ of chewing tobacco next to your gums causes constant irritation. 2  The effect is permanent damage to your gums and the surrounding bone. 3  Damaged gum tissue pulls away from the teeth, causing sensitivity and additional exposure to tooth decay.